As you may know, Pidgin is a popular multi-protocol instant messaging client, having support for popular chat services, including Y! Messenger, Steam Chat, Facebook Chat and Jabber.

The latest version available is Pidgin 2.12, which has been released a while ago, coming with the below changes:
- Fix an out of bounds memory read in purple_markup_unescape_entity
- Fix use of uninitialised memory if running non-debug-enabled versions of glib
- Updated AIM dev and dist ID’s to new ones that were assigned by AOL.
- TLS certificate verification now uses SHA-256 checksums.
- Fixed SASL external auth for Freenode.
- Removed the protocol plugin: MSN, Mxit, MySpaceIM, Yahoo!, Facebook (XMPP)
- Fixed gnutls certificate validation errors that mainly affected google (Dequis)
- Replaced instances of d.pidgin.im with developer.pidgin.im and updated the urls to use https.
- Fixed issue of messages being silently cut off at 500 characters.
Installation instructions:
In order to successfully install Pidgin on your Ubuntu system, you have to add the PPA to your system, update the local repository index and install the pidgin package:
$ sudo add-apt-repository ppa:jonathonf/backports
$ sudo apt-get update
$ sudo apt-get install pidgin
Optional, to remove pidgin, do:
$ sudo apt-get remove pidgin
The installation instructions work on Ubuntu 16.04 Xenial Xerus and Linux Mint 18.x.